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Surface Treatments Effects for NO2 Gas Responsivity of p-Type Surface Conductive Layer on Diamond Films

Published online by Cambridge University Press:  18 July 2014

Kenichi Haruta ,
Hideki Kimura  and
Masafumi Chiba
Kenichi Haruta
Affiliation:
Dept. Electrical and Electronic Engineering, Tokai Univ., Hiratsuka, Kanagawa, Japan.
Hideki Kimura
Affiliation:
Dept. Electrical and Electronic Engineering, Tokai Univ., Hiratsuka, Kanagawa, Japan.
Masafumi Chiba
Affiliation:
Dept. Materials Chemistry, Tokai Univ., Numazu, Shizuoka, Japan.
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Abstract

The low resistance layer called p-type Surface Conductive Layer (PSCL) is formed when the nitrogen dioxide (NO2) was absorbed onto hydrogen-terminated surface, although the diamond is generally isolator. The PSCL conductance is dependent on NO2 concentration in the atmosphere, and this reaction has reversibility. The diamond having these characteristics can apply to gas sensor. In this study, the gas responsivity of PSCL was improved by surface treatment. The changes in the responsivity were evaluated from serial measurements of the conductance in the gas atmosphere. From this evaluation, it was observed that the adsorption and desorption of NO2 were faster via the surface conditions variation by treatment.

Keywords

diamondsurface reactionsensor
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1634: Symposium S – Diamond Electronics and Biotechnology—Fundamentals to Applications VII , 2014 , mrsf13-1634-s04-14
Copyright
Copyright © Materials Research Society 2014 

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References

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